Pillow/Tests/test_file_tiff.py

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2014-07-07 21:03:50 +04:00
from helper import unittest, PillowTestCase, lena, py3
from PIL import Image
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class TestFileTiff(PillowTestCase):
def test_sanity(self):
file = self.tempfile("temp.tif")
lena("RGB").save(file)
im = Image.open(file)
im.load()
self.assertEqual(im.mode, "RGB")
self.assertEqual(im.size, (128, 128))
self.assertEqual(im.format, "TIFF")
lena("1").save(file)
im = Image.open(file)
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lena("L").save(file)
im = Image.open(file)
lena("P").save(file)
im = Image.open(file)
lena("RGB").save(file)
im = Image.open(file)
lena("I").save(file)
im = Image.open(file)
def test_mac_tiff(self):
# Read RGBa images from Mac OS X [@PIL136]
file = "Tests/images/pil136.tiff"
im = Image.open(file)
self.assertEqual(im.mode, "RGBA")
self.assertEqual(im.size, (55, 43))
self.assertEqual(im.tile, [('raw', (0, 0, 55, 43), 8, ('RGBa', 0, 1))])
im.load()
def test_gimp_tiff(self):
# Read TIFF JPEG images from GIMP [@PIL168]
codecs = dir(Image.core)
if "jpeg_decoder" not in codecs:
self.skipTest("jpeg support not available")
file = "Tests/images/pil168.tif"
im = Image.open(file)
self.assertEqual(im.mode, "RGB")
self.assertEqual(im.size, (256, 256))
self.assertEqual(
im.tile, [
('jpeg', (0, 0, 256, 64), 8, ('RGB', '')),
('jpeg', (0, 64, 256, 128), 1215, ('RGB', '')),
('jpeg', (0, 128, 256, 192), 2550, ('RGB', '')),
('jpeg', (0, 192, 256, 256), 3890, ('RGB', '')),
])
im.load()
def test_xyres_tiff(self):
from PIL.TiffImagePlugin import X_RESOLUTION, Y_RESOLUTION
file = "Tests/images/pil168.tif"
im = Image.open(file)
assert isinstance(im.tag.tags[X_RESOLUTION][0], tuple)
assert isinstance(im.tag.tags[Y_RESOLUTION][0], tuple)
# Try to read a file where X,Y_RESOLUTION are ints
im.tag.tags[X_RESOLUTION] = (72,)
im.tag.tags[Y_RESOLUTION] = (72,)
im._setup()
self.assertEqual(im.info['dpi'], (72., 72.))
def test_little_endian(self):
im = Image.open('Tests/images/16bit.cropped.tif')
self.assertEqual(im.getpixel((0, 0)), 480)
self.assertEqual(im.mode, 'I;16')
b = im.tobytes()
# Bytes are in image native order (little endian)
if py3:
self.assertEqual(b[0], ord(b'\xe0'))
self.assertEqual(b[1], ord(b'\x01'))
else:
self.assertEqual(b[0], b'\xe0')
self.assertEqual(b[1], b'\x01')
def test_big_endian(self):
im = Image.open('Tests/images/16bit.MM.cropped.tif')
self.assertEqual(im.getpixel((0, 0)), 480)
self.assertEqual(im.mode, 'I;16B')
b = im.tobytes()
# Bytes are in image native order (big endian)
if py3:
self.assertEqual(b[0], ord(b'\x01'))
self.assertEqual(b[1], ord(b'\xe0'))
else:
self.assertEqual(b[0], b'\x01')
self.assertEqual(b[1], b'\xe0')
def test_12bit_rawmode(self):
""" Are we generating the same interpretation
of the image as Imagemagick is? """
# Image.DEBUG = True
im = Image.open('Tests/images/12bit.cropped.tif')
# to make the target --
# convert 12bit.cropped.tif -depth 16 tmp.tif
# convert tmp.tif -evaluate RightShift 4 12in16bit2.tif
# imagemagick will auto scale so that a 12bit FFF is 16bit FFF0,
# so we need to unshift so that the integer values are the same.
im2 = Image.open('Tests/images/12in16bit.tif')
if Image.DEBUG:
print (im.getpixel((0, 0)))
print (im.getpixel((0, 1)))
print (im.getpixel((0, 2)))
print (im2.getpixel((0, 0)))
print (im2.getpixel((0, 1)))
print (im2.getpixel((0, 2)))
self.assert_image_equal(im, im2)
def test_32bit_float(self):
# Issue 614, specific 32 bit float format
path = 'Tests/images/10ct_32bit_128.tiff'
im = Image.open(path)
im.load()
self.assertEqual(im.getpixel((0, 0)), -0.4526388943195343)
self.assertEqual(
im.getextrema(), (-3.140936851501465, 3.140684127807617))
if __name__ == '__main__':
unittest.main()
# End of file